JPS59167457A - Paper roll holder - Google Patents

Abstract

PURPOSE:To facilitate setting and removal of a paper roll by providing a boss with elasticity so as to be fitted in a shaft groove at the flanged part. CONSTITUTION:A flange 12 is fixed to a shaft 11 by fitting a boss 15 at the flange 12 in a groove 13 in said shaft 11 by the use of elasticity of the boss 15, so that movement of the flange 12 along the shaft 11 with a force against said elasticity of boss 15 will provide fixation of the flange 12 to the shaft 11 to ensure simple and easy mounting and removal of a paper roll. Because the groove 13 and boss 15 are formed in the shaft 11 and on the flange 12, respectively, and because this groove 13 has a roll size position indicating function, the flange 12 can be fixed at the specified size position only by fitting the boss 15 of the flane 12 in the appropriate groove 13. Accordingly paper rolls in different sizes can be located simply and certainly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holder for roll paper loaded into a copying machine, facsimile machine, etc. and used as recording paper.

Roll paper is made by winding paper many times around a core, and it is difficult to rotatably load it into a machine in that state.

Conventionally, roll paper is held in a holder and rotatably loaded into the machine via the holder.

For example, as shown in FIG. 1, a pair of flanges 3 are provided on the shaft 2 through which the core (not shown) of the roll paper 1 is inserted, and the flanges 3 are pressed against both end surfaces of the roll paper 10, and the locking member 4 locks the flange 3. By fixing the roll paper 1
A holder has been proposed in which the roll paper 1 is rotatably loaded into the machine by holding both ends of the shaft 20 rotatably on a bracket or the like provided inside the machine.

However, with this structure, the locking means 4 must be locked and unlocked when loading and unloading the roll paper.
The problem is that the attachment and detachment work is very troublesome and time consuming.

Furthermore, the locking means 4 must have a structure in which it is fixed to the shaft 2 by rotating itself, resulting in a complicated structure such as a chuck mechanism, which increases the cost and requires a shaft of the locking means 4. Since the fixing force to the shaft 2 is uneven depending on the extent of rotation operation by the operator, the fixation to the shaft 2 may be unstable and the 7 lunge 3 may move, which may cause the roll paper 1 to be held in an unstable manner. Definitely has a defect.

In addition, when holding roll paper 1 of different sizes, the position of the flange 3 is different, so as shown in FIG. This size display 2a/2b
I try to position it by aligning 7 lunge 3 with .

For this reason, there are problems such as the positioning operation of the flange 3 is troublesome and positioning errors are likely to occur.

The present invention has been made in view of the above circumstances, and its purpose is to provide a simple and easy attachment/detachment operation for roll paper, a simple structure and low cost, and a simple method for handling roll paper of different sizes. Moreover, it is an object of the present invention to provide a roll paper holder that can be reliably positioned and held.

The present invention will be described in detail below with reference to FIG. 3 and subsequent figures.

A shaft 11 passing through a core (not shown) of the roll paper 10
A pair of flanges 12 are provided at both ends of the holder so as to be movable in the axial direction and fixed at a predetermined position, thereby forming a holder.

At both ends of the shaft 11, there are grooves 13 that serve both to display the size of the roll paper 1° and to fix the flange 12, depending on the size of the roll paper 10 (A3 size roll paper, A1 size roll paper AI). The groove portions 13 are formed at the tapered bottom walls 13a that are tapered in the axial direction.
and the annular stepped portion 13b that is substantially perpendicular to the axial direction, forming an annular shape with a cross-sectional shape of a square cross section.The left and right groove portions 13 are symmetrical so that the annular stepped portion 13b is closer to the end of the shaft 11. It becomes.

The 7 flange 12 is formed with a hole 15 having a function of slidingly guiding the flange 12 into the shaft 11 and fixing the flange 12 to the groove 13 of the shaft 11.

That is, as shown in FIGS. 5, 6, and 7, a hole 14 having approximately the same diameter as the shaft 11 is formed in the flange 12, and a portion facing the diameter of the hole 14 has an inner diameter. Side 12
Notches 16 and 16 opened at a are formed, and the outer surface +2
A pair of notch grooves 17, 17 that are open to the hole 14 and the notch 16 are formed on both sides of the portion remaining on the b side, forming tongue-shaped convex portions 15, and the tip surface of the convex portion 15. 15a has a circular arc shape and projects inwardly from the hole 14, and the convex portion 15 is configured to be elastically displaceable with respect to the flange 12.

Here, the diameter of the hole 14 is dl, and the tip surface 15 opposite the convex portion 150 is
If the diameter between a and 15a is d2, the diameter of the shaft 11 is ■, and the bottom diameter of the groove 13 is eight, then dyu>Dwork>d2≧D2.

The shaft 11 is then inserted into the core (not shown) of the roll paper 10, and the roll paper 10 is positioned relative to the shaft 11 using the groove 13 having a size display function as a guide.

Next, the flanges 12 are inserted into both ends of the shaft 11. At this time, since Di > d2, the convex portion 15 is elastically deformed in the axial direction, but the seven langes 12 are inserted so that the convex portion 15 is elastically deformed inward.

When the 7-lunge 12 is inserted to the position facing the predetermined groove 13 (that is, the position where the roll paper 10 is set), the protrusion 15 is released and the elastic force moves the flange 12 into the groove 13 as shown in FIG. protrude and fit in.

As a result, the convex portion 15 of the flange 12 is engaged with the annular stepped portion 13b of the groove portion 13, and the flange 12 is fixed to the shaft 11, so that the roll paper 10 can be held.

When the roll paper 10 is pulled out from the shaft 11, the convex part 15 is curved and elastically deformed to be separated from the annular stepped part 13b, and in this state, after the 7-lunge 12 is pulled out from the shaft 11, the shaft 11 is removed from the roll paper. Just pick it out from 10.

At this time, the convex portion 15 can be smoothly curved and elastically deformed along the tapered bottom portion 13aK of the groove portion I3.

The present invention is as described above, and the convex portion 15 of the flange 12 is
Because the elastic force fits into the groove 13 of the shaft 11 and fixes the flange I2 to the shaft 11, the protrusion 15
The flange 12 can be fixed to the shaft 11 by moving the flange 12 over the shaft 11 with a force that resists the elastic force of the roll paper, and the operation of attaching and detaching the roll paper becomes simple and easy.

In addition, since the shaft 11 is only provided with the groove 13 and the flange 12 is provided with the convex portion 15, there is no need for a complicated locking means as in the prior art, resulting in a simple structure and low cost.

In addition, since the groove 13 has a roll paper size position display function, the flange 12 can be fixed at a predetermined size position simply by fitting the protrusion 15 of the flange 12 into the predetermined groove 13, allowing roll paper of different sizes to be displayed. can be easily and securely positioned and held.

In addition, the shaft 11 of the seven langes 12 is
The fixing force to the flange is determined, and the flange fixing force is always kept constant regardless of the amount of operation by the operator.
1 cl of roll paper can be held reliably and stably.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional example, Fig. 2 is a perspective view of its shaft, Fig. 3 is an overall perspective view showing an embodiment of the present invention, Fig. 4 is a front view of the shaft, and Fig. 5 is a 7-lunger. 6 is a longitudinal sectional view, FIG. 7 is a right side view, and FIG. 8 is a sectional view of the flange fixed state. 10 is roll paper, 11 is shaft, 12 is flange, 1
3 is a groove portion, and 15 is a convex portion. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Hamamoto Tadashiro H Ward ~ 1. Figure 7

Claims (1)

[Claims] At both ends of the shaft 110 inserted into the core of the roll paper 10, grooves 13 having a function of displaying the set position for each roll paper size are formed, and a pair of left and right flanges 12, 12 fitted into the shaft 11 have the above-mentioned A protrusion 15 having an elastic force that fits into the groove I3 is formed, and the protrusion I5 is fitted into the groove 13 with elastic force to position and fix the 7 langes 12 to the shaft 11. A roll paper holder featuring: